CN113750793A - Ammonia injection control method and device for flue gas denitration, terminal equipment and storage medium - Google Patents
Ammonia injection control method and device for flue gas denitration, terminal equipment and storage medium Download PDFInfo
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- CN113750793A CN113750793A CN202010553709.XA CN202010553709A CN113750793A CN 113750793 A CN113750793 A CN 113750793A CN 202010553709 A CN202010553709 A CN 202010553709A CN 113750793 A CN113750793 A CN 113750793A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/346—Controlling the process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
Abstract
The application is suitable for the technical field of flue gas denitration, and particularly relates to an ammonia injection control method and device for flue gas denitration, terminal equipment and a storage medium. The target ammonia injection flow and the target ammonia injection pipeline pressure are output by controlling the valve body at the target ammonia injection time point through comparing the real-time flue gas data with the historical ammonia injection control data, for example, the target ammonia injection flow and the target ammonia injection pipeline pressure are output by controlling the target valve body at the time point spaced by the target ammonia injection delay time after the acquisition time point of the real-time flue gas data, so that the delayed ammonia injection control is realized, the influence of the delay of flue gas flowing into a reactor on the accuracy of the ammonia injection control is avoided, the ammonia injection control is more reasonable, the real-time flue gas data can be combined with the historical ammonia injection control data for analysis, the ammonia injection control amount can be accurately determined, and the ammonia injection flow and the ammonia injection pipeline pressure can be controlled more timely and accurately.
Description
Technical Field
The application belongs to the technical field of flue gas denitration, and particularly relates to an ammonia injection control method and device for flue gas denitration, terminal equipment and a storage medium.
Background
The Selective Catalytic Reduction (SCR) technology is the most widely applied technology in the current flue gas denitration, and the working principle is as follows: under the action of a catalyst, ammonia is sprayed into the flue gas with the temperature ranging from 280 ℃ to 420 ℃, and NO is sprayedXReduction to N2And H2And O, wherein the control precision of ammonia injection quantity influences the denitration efficiency, and the current SCR flue gas denitration ammonia injection control strategy generally adopts single-loop proportional-Integral-derivative (PID) control or ammonia nitrogen molar ratio cascade control and the like.
However, the SCR flue gas denitration condition is complicated, the flue gas is detected by the inlet flue gas automatic Monitoring System (CEMS) after being detected by the inlet flue gas automatic Monitoring System (CEMS), and is detected by the outlet CEMS after being denitrated by the SCR denitration reactor, and a certain distance is left between the ammonia injection regulating valve and the SCR denitration reactor, and a certain time is required for the regulating valve to operate until the ammonia enters the SCR denitration reactor, so that the control has hysteresis and is influenced by the combustion condition, and the denitration inlet NO is not limited by the inlet flue gas automatic Monitoring System (CEMS) at the inletxThe concentration change is large and quick, the problem of time delay cannot be solved due to single-loop PID control or ammonia nitrogen molar ratio cascade, and the regulation speed is low due to the characteristics of PID, so that the response to NO at a denitration inlet cannot be realizedxThe change in concentration easily causes overshoot. Therefore, the ammonia injection amount can not be timely and accurately adjusted by the existing ammonia injection control method such as single-loop PID control or cascade control, and the ammonia injection amount is easily over-large or over-small, so that ammonia escapes or NO is discharged from an exhaust outletxThe concentration exceeds the standard.
Disclosure of Invention
The embodiment of the application provides an ammonia injection control method, an ammonia injection control device, terminal equipment and a storage medium for flue gas denitration, and can solve the problem that the ammonia injection amount of the existing ammonia injection control method is not adjusted timely and accurately.
In a first aspect, an embodiment of the present application provides an ammonia injection control method for flue gas denitration, where the ammonia injection control method includes:
acquiring real-time flue gas data and a time tag of the real-time flue gas data, wherein the real-time flue gas data comprises real-time inlet data of a flue gas inlet and real-time outlet data of a flue gas outlet, the real-time inlet data is used for reflecting flue gas characteristics of the flue gas inlet, and the real-time outlet data is used for reflecting flue gas characteristics of the flue gas outlet;
acquiring historical ammonia injection control data;
according to the real-time flue gas data and the historical ammonia injection control data, acquiring target ammonia injection flow, target ammonia injection pipeline pressure and target ammonia injection delay time;
acquiring a target ammonia spraying time point according to the time label and the target ammonia spraying delay time length;
and sending the target ammonia spraying time point, the target ammonia spraying flow and the target ammonia spraying pipeline pressure to a target valve body, wherein the target ammonia spraying time point, the target ammonia spraying flow and the target ammonia spraying pipeline pressure are used for indicating the target valve body to spray ammonia.
In a second aspect, an embodiment of the present application provides an ammonia injection control device for flue gas denitration, where the ammonia injection control device includes:
the real-time data acquisition module is used for acquiring real-time flue gas data and a time tag of the real-time flue gas data, wherein the real-time flue gas data comprises real-time inlet data of a flue gas inlet and real-time outlet data of a flue gas outlet, the real-time inlet data is used for reflecting flue gas characteristics of the flue gas inlet, and the real-time outlet data is used for reflecting flue gas characteristics of the flue gas outlet;
the control data acquisition module is used for acquiring historical ammonia spraying control data;
the data acquisition module is used for acquiring target ammonia spraying flow, target ammonia spraying pipeline pressure and target ammonia spraying delay time according to the real-time flue gas data and the historical ammonia spraying control data;
the time point acquisition module is used for acquiring a target ammonia spraying time point according to the time label and the target ammonia spraying delay time length;
and the data sending module is used for sending the target ammonia spraying time point, the target ammonia spraying flow and the target ammonia spraying pipeline pressure to a target valve body, and the target ammonia spraying time point, the target ammonia spraying flow and the target ammonia spraying pipeline pressure are used for indicating the target valve body to spray ammonia.
In a third aspect, an embodiment of the present application provides a terminal device, where the terminal device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor, when executing the computer program, implements the ammonia injection control method for flue gas denitration according to the first aspect.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the method for controlling ammonia injection for flue gas denitration according to the first aspect is implemented.
In a fifth aspect, embodiments of the present application provide a computer program product, which, when running on a terminal device, causes the terminal device to execute the ammonia injection control method for flue gas denitration according to the first aspect.
Compared with the prior art, the embodiment of the application has the advantages that: the method comprises the steps of comparing real-time data of flue gas with historical ammonia spraying control data to obtain a target valve body for outputting a target ammonia spraying flow, a target ammonia spraying pipeline pressure and a target ammonia spraying delay time, and then the valve body is controlled to output a target ammonia injection flow and a target ammonia injection pipeline pressure at a target ammonia injection time point, for example, after the acquisition time point of the real-time data of the flue gas, the time point of the target ammonia spraying delay time length is spaced, the target valve body is controlled to output the target ammonia spraying flow and the target ammonia spraying pipeline pressure, the delayed ammonia spraying control is realized, the influence of the lag of the flue gas flowing into the reactor on the accuracy of the ammonia spraying control is avoided, the ammonia injection control is more reasonable, the real-time flue gas data and the historical ammonia injection control data are analyzed in combination, the ammonia injection control amount can be accurately determined, and the ammonia injection flow and the ammonia injection pipeline pressure can be accurately controlled in time.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic flow chart of an ammonia injection control method for denitration of flue gas according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of an environmental desulfurization and denitrification process provided in the first embodiment of the present application;
FIG. 3 is a schematic flow chart of an ammonia injection control method for denitration of flue gas according to the second embodiment of the present application;
FIG. 4 is a schematic structural diagram of an ammonia injection control device for flue gas denitration provided in the third embodiment of the present application;
fig. 5 is a schematic structural diagram of a terminal device according to a fourth embodiment of the present application;
in the figure, 21 is a pressure regulating valve, 22 is a flow regulating valve, and 23 is an induced draft fan.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
The embodiment of the application provides an ammonia injection control method for flue gas denitration, which can be applied to terminal devices such as desktop computers, notebook computers, ultra-mobile personal computers (UMPCs), netbooks, cloud servers and Personal Digital Assistants (PDAs), and the embodiment of the application does not limit the specific types of the terminal devices.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
In order to explain the technical solution described in the present application, the following description will be given by way of specific examples.
Referring to fig. 1, a flow of an ammonia injection control method for flue gas denitration provided in an embodiment of the present application is shown, where the ammonia injection control method is applicable to a terminal device, and as shown in the drawing, the ammonia injection control method may include the following steps:
and S101, acquiring real-time smoke data and a time tag of the real-time smoke data.
The real-time data of the flue gas comprises real-time data of an inlet of a flue gas inlet and real-time data of an outlet of the flue gas outlet, the real-time data of the inlet is used for reflecting the flue gas characteristics of the flue gas inlet, the real-time data of the outlet is used for reflecting the flue gas characteristics of the flue gas outlet, and the real-time data of the inlet of the flue gas inlet comprises but is not limited to flue gas flow, flue draft and flue gas O2Concentration and flue gas NOxConcentration, real time outlet data for flue gas outlet including but not limited to flue gas O2Concentration and flue gas NOxAnd (4) concentration.
The time tag may refer to a time point of acquiring the real-time data of the flue gas, for example, the time point of acquiring the real-time data of the flue gas is t, and the corresponding time tag is t; for convenience of description, in the present application, a time corresponding to the time point of collecting the real-time data of the flue gas is taken as a current time.
Referring to fig. 2, which is a schematic structural diagram of an environment-friendly desulfurization and denitrification process provided in an embodiment of the present application, an inlet CEMS is arranged at a flue gas inlet and is used for collecting inlet real-time data; an outlet CEMS is arranged between the SCR reactor and the induced draft fan 23 and is used for collecting outlet real-time data. The terminal equipment can also interact with a Distributed Control System (DCS), and acquires the real-time smoke data and the time label of the real-time smoke data from the feedback of the DCS by issuing the data acquisition command to the DCS, wherein the DCS is connected with the inlet CEMS and the outlet CEMS to acquire the real-time smoke data in real time; in fig. 2, the flue gas passes through the desulfurization tower and the dust remover, then is mixed with ammonia gas, and enters the SCR reactor for denitration flue gas real-time data. In addition, P in the PIC1001 in fig. 2 is indicated as pressure, I is shown, C is control, and the meter position number is 1001; in FIC1001, F is the flow rate, I is the display, C is the control, and the gauge number is 1001.
Step S102, historical ammonia injection control data is obtained.
The historical ammonia spraying control data is stored in the database and is ammonia spraying control data before the current moment, the historical ammonia spraying control data comprises at least one group of control data, the group of control data comprises flue gas historical data and ammonia spraying control amount corresponding to the flue gas historical data, and the type of the flue gas historical data is the same as that of the flue gas real-time data.
For example, the real-time flue gas data includes inlet flue gas flow and inlet stack suction, and the historical flue gas data is required to have the inlet flue gas flow and the inlet stack suction. The inlet real-time data in the application comprises 4 data types, namely inlet flue gas flow, inlet flue suction and inlet flue gas O2Concentration and inlet flue gas NOxConcentration and outlet real-time data comprise 2 data types which are respectively outlet flue gas O2Concentration and outlet flue gas NOxConcentration, therefore, the flue gas history data includes 6 data types, respectively inlet flue gas flow, inlet flue draft, inlet flue gas O2Concentration, inlet flue gas NOxConcentration, outlet flue gas O2Concentration and outlet flue gas NOxAnd (4) concentration. The ammonia injection control amount corresponding to the flue gas historical data comprises but is not limited to ammonia injection flow, ammonia injection pipeline pressure, an ammonia injection delay time length flow weighting coefficient, a pressure weighting coefficient and a time length weighting coefficient, wherein the flow weighting coefficient, the pressure weighting coefficient and the time length weighting coefficient are used for correcting the ammonia injection flow, the ammonia injection pipeline pressure and the ammonia injection delay time length according to the flue gas real-time data. Optionally, the historical ammonia injection control data may further include denitration efficiency,Time, etc.
And S103, acquiring target ammonia injection flow, target ammonia injection pipeline pressure and target ammonia injection delay time according to the real-time flue gas data and the historical ammonia injection control data.
And matching a group of control data from the historical ammonia injection control data according to the real-time data of the flue gas and the preset logic, and determining the target ammonia injection flow, the target ammonia injection pipeline pressure and the target ammonia injection delay time according to the ammonia injection flow, the ammonia injection pipeline pressure and the ammonia injection delay time in the group of control data. When a group of control data cannot be matched from the historical ammonia spraying control data, the terminal equipment can prompt in a mode of outputting alarm information and the like.
When the control data of the historical ammonia injection control data are enough, the real-time data of the flue gas can be matched with the same group of control data in the historical ammonia injection control data, and the ammonia injection flow, the ammonia injection pipeline pressure and the ammonia injection delay time of the group of control data are the target ammonia injection flow, the target ammonia injection pipeline pressure and the target ammonia injection delay time.
When the control data of the historical ammonia injection control data is less, the flue gas real-time data may not be matched with the same group of control data, and only similar control data can be matched, and because the flue gas real-time data is different from the flue gas historical data in the control data to a certain extent, the ammonia injection flow, the ammonia injection pipeline pressure and the ammonia injection delay time length in the control data also need to be corrected to meet the requirement of the flue gas real-time data on ammonia injection control, so that each group of control data of the historical ammonia injection control data also needs to comprise a flow weighting coefficient, a pressure weighting coefficient and a time length weighting coefficient.
Optionally, the method includes the steps of obtaining a target ammonia injection flow, a target ammonia injection pipeline pressure and a target ammonia injection delay time according to the real-time flue gas data and historical ammonia injection control data, and includes:
detecting whether the at least one group of control data has flue gas historical data which is the same as the real-time flue gas data;
if the historical flue gas data which is the same as the real-time flue gas data exists, determining the historical flue gas data which is the same as the real-time flue gas data as target historical flue gas data, determining the ammonia injection flow corresponding to the target historical flue gas data as a target ammonia injection flow, determining the ammonia injection pipeline pressure corresponding to the target historical flue gas data as the target ammonia injection pipeline pressure, and determining the ammonia injection delay time corresponding to the target historical flue gas data as the target ammonia injection delay time;
if the historical flue gas data which are the same as the real-time flue gas data do not exist, the similarity between the historical flue gas data and the real-time flue gas data in at least one group of control data is obtained;
detecting whether smoke historical data with the similarity exceeding a similarity threshold exists in at least one group of control data;
if the smoke history data with the similarity exceeding the similarity threshold value with the smoke real-time data exists, determining the smoke history data with the similarity exceeding the similarity threshold value with the smoke real-time data as alternative smoke history data, and acquiring a difference value between the alternative smoke history data and the smoke real-time data;
acquiring a flow weighted value according to the flow weighted coefficient corresponding to the difference value and the alternative flue gas historical data; acquiring a pressure weighted value according to the pressure weighted coefficient corresponding to the difference value and the alternative flue gas historical data; acquiring a duration weighted value according to the difference value and a duration weighted coefficient corresponding to the alternative flue gas historical data;
correcting the ammonia injection flow corresponding to the historical data of the alternative flue gas according to the flow weighting value to obtain a target ammonia injection flow; correcting the pressure of the ammonia injection pipeline corresponding to the historical data of the alternative flue gas according to the pressure weighted value to obtain the pressure of the target ammonia injection pipeline; and correcting the ammonia injection delay time corresponding to the historical data of the alternative flue gas according to the time weighting value to obtain the target ammonia injection delay time.
When the similarity comparison is carried out on the real-time flue gas data and each group of control data in the historical ammonia spraying control data, the real-time flue gas data and the historical flue gas data are compared, the real-time flue gas data and each data category in the historical flue gas data can be compared one by one, the similarity between the real-time flue gas data and the historical flue gas data can be evaluated through a least square method, and a group of control data meeting the preset similarity condition can be found out.
The historical flue gas data which is completely the same as the real-time flue gas data can be matched in the historical ammonia spraying control data, the real-time inlet data of the real-time flue gas data is the same as the historical inlet data of the historical flue gas data, the real-time outlet data of the real-time flue gas data is the same as the historical outlet data of the historical flue gas data, and obviously, the ammonia spraying control quantity corresponding to the historical flue gas data is controlled; if only similar flue gas historical data can be matched, the ammonia injection flow, the ammonia injection pipeline pressure and the ammonia injection delay time length need to be corrected by the weighting coefficient corresponding to the similar flue gas historical data. For example, for the target ammonia injection flow, the flow weighting value is obtained by performing weighted addition on the difference between the real-time flue gas data and the historical flue gas data through the flow weighting coefficient, and the target ammonia injection flow can be obtained by adding the flow weighting value and the ammonia injection flow corresponding to the historical flue gas data.
In addition, if at least two flue gas historical data with the similarity exceeding the similarity threshold value with the real-time flue gas data exist, the flue gas historical data with the higher similarity is selected from the at least two flue gas historical data to serve as candidate flue gas historical data.
And step S104, acquiring a target ammonia spraying time point according to the time label and the target ammonia spraying delay time.
And the time point corresponding to the target ammonia spraying delay time after the time label is the target ammonia spraying time point. For example, in the real-time flue gas data acquired at the current time t, if the target ammonia injection delay time is 3s, the target ammonia injection time is t + 3.
And step S105, sending the target ammonia spraying time point, the target ammonia spraying flow and the target ammonia spraying pipeline pressure to a target valve body.
The target ammonia spraying time point, the target ammonia spraying flow and the target ammonia spraying pipeline pressure are used for indicating a target valve body to spray ammonia, the target valve body is a flow regulating valve and a pressure regulating valve which are used for controlling the ammonia spraying flow and the ammonia spraying pipeline pressure, as can be seen from fig. 2, a pressure regulating valve 21 and a flow regulating valve 22 are arranged on a circulation pipeline of ammonia gas in the drawing, and the pipeline pressure and flow in the circulation ammonia gas pipeline are controlled by the pressure regulating valve 21 and the flow regulating valve 22.
During actual use, the terminal equipment can output the target ammonia spraying time point, the target ammonia spraying flow and the target ammonia spraying pipeline pressure to the DCS, wherein the DCS is connected with and controls the pressure regulating valve and the flow regulating valve on the ammonia circulation pipeline.
Because the flue gas from entry CEMS to the in-process of SCR reactor need pass through desulfurizing tower and dust remover, consequently, the flue gas of present moment need can reach the SCR reactor after certain time, can make the flue gas of present moment and the ammonia that spouts the ammonia control to produce reach the SCR reactor simultaneously through delaying ammonia control for ammonia and flue gas fully react, avoid ammonia escape or the lower condition of deamination efficiency to appear.
Optionally, after sending the target ammonia injection time point, the target ammonia injection flow rate, and the target ammonia injection pipeline pressure to the target valve body, the method further includes:
obtaining candidate NO of smoke outletxConcentration, candidate NO of flue gas outletxThe concentration acquisition time point is a time point corresponding to the time when the timing time reaches the preset time from the target ammonia spraying time point;
according to the inlet real-time data, the target ammonia injection flow, the target ammonia injection pipeline pressure and the candidate NOxConcentration, obtaining denitration efficiency;
determination of candidate NOxWhether the concentration is within a concentration threshold and whether the denitration efficiency is within an efficiency threshold;
if candidate NOxModifying at least one coefficient of a flow weighting coefficient, a pressure weighting coefficient and a duration weighting coefficient if the concentration is not within a concentration threshold or the denitration efficiency is not within an efficiency threshold, taking the alternative flue gas historical data, the ammonia injection flow, the ammonia injection pipeline pressure and the ammonia injection delay duration corresponding to the alternative flue gas historical data, and modified coefficients and unmodified coefficients in the flow weighting coefficient, the pressure weighting coefficient and the duration weighting coefficient as a group of control data, and adding the group of control data to the historical ammonia injection control data;
if NOxAnd if the concentration is within the concentration threshold and the denitration efficiency is within the efficiency threshold, taking the flow weighting coefficient, the pressure weighting coefficient and the time duration weighting coefficient corresponding to the real-time flue gas data and the historical alternative flue gas data, as well as the target ammonia injection flow, the target ammonia injection pipeline pressure and the target ammonia injection delay time duration as a group of control data, and adding the group of control data to the historical ammonia injection control data.
Wherein, in order to evaluate the effect of denitration according to target ammonia injection flow, target pipeline pressure and target ammonia injection delay duration, the application obtains the candidate NO of the flue gas outlet after the preset timexConcentration of candidate NOxThe concentration acquisition time point is a time point corresponding to the time point when the timing time reaches a preset time length, and the preset time length can be adjusted according to the actual condition. Similarly, the terminal equipment issues a control instruction to the DCS at the sampling time point so that the outlet CEMS collects NOxAnd obtaining the concentration through DCS.
According to the oxygen concentration and NO of the flue gas in the inlet real-time dataxConcentration and candidate NO remaining after reactionxThe concentration, combined with the ammonia gas amount, can calculate the denitration efficiency if NOxIf the concentration is within the concentration threshold and the denitration efficiency is within the efficiency threshold, judging that the ammonia spraying effect is good, and taking the flue gas real-time data, the flow weighting coefficient, the pressure weighting coefficient and the time length weighting coefficient corresponding to the alternative flue gas historical data, the target ammonia spraying flow, the target ammonia spraying pipeline pressure and the target ammonia spraying delay time length as a group of control data, namely one of the historical ammonia spraying control data, and storing the control data in a database; under other conditions, the ammonia injection effect is judged to be 'bad', at least one weighting coefficient of the flow weighting coefficient, the pressure weighting coefficient and the time duration weighting coefficient is modified according to preset logic, if the flow weighting coefficient is modified, the modified flow weighting coefficient is obtained, the modified flow weighting coefficient, the unmodified pressure weighting coefficient, the unmodified time duration weighting coefficient and the alternative flue gas historical data, as well as the ammonia injection flow, the ammonia injection pipeline pressure and the ammonia injection delay time duration corresponding to the alternative flue gas historical data are stored in historical ammonia injection control dataDeleting the control data before modifying the weighting coefficient; and if the flow weighting coefficient, the pressure weighting coefficient and the time length weighting coefficient are modified, obtaining the modified flow weighting coefficient, the pressure weighting coefficient and the time length weighting coefficient, and storing the modified flow weighting coefficient, the pressure weighting coefficient, the time length weighting coefficient, the alternative flue gas historical data, and the ammonia injection flow, the ammonia injection pipeline pressure and the ammonia injection delay time length corresponding to the alternative flue gas historical data into historical ammonia injection control data.
The embodiment of the application obtains the target ammonia spraying flow, the target ammonia spraying pipeline pressure and the target ammonia spraying delay time length by comparing the real-time data of the flue gas with the historical ammonia spraying control data and then outputs the target valve body, and then the valve body is controlled to output a target ammonia injection flow and a target ammonia injection pipeline pressure at a target ammonia injection time point, for example, the target valve body is controlled to output the target ammonia spraying flow and the target ammonia spraying pipeline pressure at the time point which is spaced with the target ammonia spraying delay time length after the acquisition time point of the real-time data of the flue gas, the delayed ammonia spraying control is realized, the influence of the lag of the flue gas flowing into the reactor on the accuracy of the ammonia spraying control is avoided, the ammonia injection control is more reasonable, the real-time flue gas data and the historical ammonia injection control data are analyzed in combination, the ammonia injection control amount can be accurately determined, and the ammonia injection flow and the ammonia injection pipeline pressure can be accurately controlled in time.
Referring to fig. 3, it is a flow of an ammonia injection control method for flue gas denitration provided in the second embodiment of the present application, and the ammonia injection control method may be applied to a terminal device, as shown in the figure, the ammonia injection control method may include the following steps:
step S301, acquiring the real-time smoke data and the time tag of the real-time smoke data.
Step S302, historical ammonia injection control data is obtained.
And step S303, judging whether the real-time data of the flue gas is effective.
If the real-time data of the flue gas is valid, executing the step S304; and if the real-time data of the flue gas is invalid, outputting alarm information.
Optionally, judging whether the real-time data of the flue gas is valid includes:
acquiring at least one group of parameter ranges;
judging whether the real-time data of the flue gas is in one group of parameter ranges in at least one group of parameter ranges;
if the real-time flue gas data are in one of the at least one group of parameter ranges, determining that the real-time flue gas data are valid;
and if the real-time flue gas data is not in one of the at least one group of parameter ranges, determining that the real-time flue gas data is invalid.
The parameter ranges may refer to a data type 1 range (x 1-x 2), a data type 2 range (y 1-y 2), and a data type 3 range (z 1-z 2), …, where the data type 1 and the data type 2 are data types of entry real-time data, and the data type 3 is a type of exit real-time data, for example, the data type 1 of the entry real-time data is x, the data type 2 is y, and the data type 3 of the exit real-time data is z, only when x1< x < x2, y1< y < y2, and z1< z < z2, the smoke real-time data is valid, and other cases are invalid and are not repeated here.
Optionally, judging whether the real-time data of the flue gas is valid further includes:
acquiring the working state of target equipment;
judging whether the working state of the target equipment is normal or not;
correspondingly, if the real-time flue gas data is within one of the at least one set of parameter ranges, determining that the real-time flue gas data is valid comprises:
if the working state of the target equipment is normal and the real-time flue gas data is in one of at least one group of parameter ranges, determining that the real-time flue gas data is valid;
and if the working state of the target equipment is abnormal, determining that the real-time data of the flue gas is invalid.
The target device can be a field instrument device and the like, such as a pressure gauge on a pipeline, the working state of the field instrument device is monitored through the monitoring device, the terminal device obtains the working state of the field instrument device through interaction with the monitoring device, and if the DCS is connected with the monitoring device, the terminal device can obtain the working state of the target device through issuing an instruction to the DCS and through information fed back from the DCS.
If the working state of the field instrument equipment is abnormal, the collected real-time data of the smoke can be determined to be invalid; and if the working state of the field instrument is normal and the real-time flue gas data is in one of the at least one group of parameter ranges, determining that the real-time flue gas data is valid.
And step S304, if the real-time flue gas data is valid, acquiring the target ammonia injection flow, the target ammonia injection pipeline pressure and the target ammonia injection delay time according to the real-time flue gas data and the historical ammonia injection control data.
And S305, acquiring a target ammonia spraying time point according to the time label and the target ammonia spraying delay time length.
And S306, sending the target ammonia spraying time point, the target ammonia spraying flow and the target ammonia spraying pipeline pressure to a target valve body.
Step S301 and step S302 are the same as step S101 and step S102 in the first embodiment, and step S304 to step S306 are the same as step S103 to step S105 in the first embodiment, and for details, refer to step S101 to step S105, which are not repeated herein.
According to the embodiment of the application, the real-time flue gas data which cannot reflect real working conditions is eliminated through analysis and detection of the real-time flue gas data, so that the influence of the invalidity of the real-time flue gas data on subsequent treatment can be avoided, the control precision of ammonia injection is improved, the invalid data is prevented from flowing into a database, and the influence on a flue gas historical data sample is avoided.
Referring to fig. 4, a block diagram of a third embodiment of the present application provides a structural block diagram of an ammonia injection control device for flue gas denitration, and for convenience of description, only the relevant parts of the third embodiment of the present application are shown.
This ammonia injection control device includes:
the real-time data acquisition module 41 is configured to acquire real-time flue gas data and a time tag of the real-time flue gas data, where the real-time flue gas data includes real-time inlet data of a flue gas inlet and real-time outlet data of a flue gas outlet, the real-time inlet data is used for reflecting flue gas characteristics of the flue gas inlet, and the real-time outlet data is used for reflecting flue gas characteristics of the flue gas outlet;
a control data acquisition module 42, configured to acquire historical ammonia injection control data;
the data acquisition module 43 is configured to acquire a target ammonia injection flow, a target ammonia injection pipeline pressure, and a target ammonia injection delay time according to the real-time flue gas data and the historical ammonia injection control data;
the time point obtaining module 44 is configured to obtain a target ammonia spraying time point according to the time tag and the target ammonia spraying delay time;
and the data sending module 45 is used for sending the target ammonia spraying time point, the target ammonia spraying flow and the target ammonia spraying pipeline pressure to the target valve body, and the target ammonia spraying time point, the target ammonia spraying flow and the target ammonia spraying pipeline pressure are used for indicating the target valve body to spray ammonia.
Optionally, the historical ammonia injection control data includes at least one group of control data, and the group of control data includes flue gas historical data and ammonia injection flow, flow weighting coefficient, ammonia injection pipeline pressure, pressure weighting coefficient, ammonia injection delay time and time weighting coefficient corresponding to the flue gas historical data; the data obtaining module 43 is specifically configured to:
detecting whether the at least one group of control data has flue gas historical data which is the same as the real-time flue gas data;
if the historical flue gas data which is the same as the real-time flue gas data exists, determining the historical flue gas data which is the same as the real-time flue gas data as target historical flue gas data, determining the ammonia injection flow corresponding to the target historical flue gas data as a target ammonia injection flow, determining the ammonia injection pipeline pressure corresponding to the target historical flue gas data as the target ammonia injection pipeline pressure, and determining the ammonia injection delay time corresponding to the target historical flue gas data as the target ammonia injection delay time;
if the historical flue gas data which are the same as the real-time flue gas data do not exist, the similarity between the historical flue gas data and the real-time flue gas data in at least one group of control data is obtained;
detecting whether smoke historical data with the similarity exceeding a similarity threshold exists in at least one group of control data;
if the smoke history data with the similarity exceeding the similarity threshold value with the smoke real-time data exists, determining the smoke history data with the similarity exceeding the similarity threshold value with the smoke real-time data as alternative smoke history data, and acquiring a difference value between the alternative smoke history data and the smoke real-time data;
acquiring a flow weighted value according to the flow weighted coefficient corresponding to the difference value and the alternative flue gas historical data; acquiring a pressure weighted value according to the pressure weighted coefficient corresponding to the difference value and the alternative flue gas historical data; acquiring a duration weighted value according to the difference value and a duration weighted coefficient corresponding to the alternative flue gas historical data;
correcting the ammonia injection flow corresponding to the historical data of the alternative flue gas according to the flow weighting value to obtain a target ammonia injection flow; correcting the pressure of the ammonia injection pipeline corresponding to the historical data of the alternative flue gas according to the pressure weighted value to obtain the pressure of the target ammonia injection pipeline; and correcting the ammonia injection delay time corresponding to the historical data of the alternative flue gas according to the time weighting value to obtain the target ammonia injection delay time.
Optionally, the ammonia injection control device further comprises:
a concentration obtaining module for obtaining the candidate NO of the smoke outletxConcentration, candidate NO of flue gas outletxThe concentration acquisition time point is a time point corresponding to the time when the timing time reaches the preset time from the target ammonia spraying time point;
a denitration efficiency obtaining module for obtaining the pressure of the target ammonia injection pipeline and the candidate NO according to the real-time data of the inlet, the target ammonia injection flow, the target ammonia injection pipeline pressurexConcentration, obtaining denitration efficiency;
an effect judgment module for judging NO candidatesxWhether the concentration is within a concentration threshold and whether the denitration efficiency is within an efficiency threshold;
modifying the control module to determine if the NO candidate isxIf the concentration is not in the concentration threshold or the denitration efficiency is not in the efficiency threshold, modifying at least one coefficient of the flow weighting coefficient, the pressure weighting coefficient and the duration weighting coefficient, and counting the history number of the alternative flue gasTaking the ammonia injection flow, the ammonia injection pipeline pressure and the ammonia injection delay time length corresponding to the historical alternative flue gas data, and modified coefficients and unmodified coefficients in the flow weighting coefficient, the pressure weighting coefficient and the time length weighting coefficient as a group of control data, and adding the group of control data to the historical ammonia injection control data;
adding a control module for if NOxAnd if the concentration is within the concentration threshold and the denitration efficiency is within the efficiency threshold, taking the flow weighting coefficient, the pressure weighting coefficient and the time duration weighting coefficient corresponding to the real-time flue gas data and the historical alternative flue gas data, as well as the target ammonia injection flow, the target ammonia injection pipeline pressure and the target ammonia injection delay time duration as a group of control data, and adding the group of control data to the historical ammonia injection control data.
Optionally, the ammonia injection control device further comprises:
the data validity judging module is used for judging whether the real-time data of the flue gas is valid or not;
accordingly, the data obtaining module 43 is specifically configured to:
and if the real-time data of the flue gas is effective, acquiring the target ammonia injection flow, the target ammonia injection pipeline pressure and the target ammonia injection delay time according to the real-time data of the flue gas and the historical ammonia injection control data.
Optionally, the data validity judging module includes:
a parameter range acquisition unit for acquiring at least one set of parameter ranges;
the parameter comparison and judgment unit is used for judging whether the real-time data of the flue gas is in one group of parameter ranges in at least one group of parameter ranges;
the data validity determining unit is used for determining that the real-time flue gas data is valid if the real-time flue gas data is in one of at least one group of parameter ranges;
and the first invalid determination unit is used for determining that the real-time smoke data are invalid if the real-time smoke data are not in one of the at least one group of parameter ranges.
Optionally, the data validity judging module further includes:
the working state acquisition unit is used for acquiring the working state of the target equipment;
the working state judging unit is used for judging whether the working state of the target equipment is normal or not;
the second invalidity determining unit is used for determining that the real-time smoke data are invalid if the working state of the target equipment is abnormal;
accordingly, the data validity determination unit is specifically configured to:
and if the working state of the target equipment is normal and the real-time flue gas data is in one of the at least one group of parameter ranges, determining that the real-time flue gas data is valid.
It should be noted that, because the contents of information interaction, execution process, and the like between the modules are based on the same concept as that of the embodiment of the method of the present application, specific functions and technical effects thereof may be specifically referred to as part two of the embodiment of the method, and details are not described here.
Fig. 5 is a schematic structural diagram of a terminal device according to a fourth embodiment of the present application. As shown in fig. 5, the terminal device 5 of this embodiment includes: at least one processor 50 (only one is shown in fig. 5), a memory 51, and a computer program 52 stored in the memory 51 and operable on the at least one processor 50, wherein when the computer program 52 is executed by the processor 50, the steps of the ammonia injection control method for flue gas denitration according to the second embodiment are implemented.
The terminal device 5 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor 50, a memory 51. Those skilled in the art will appreciate that fig. 5 is only an example of the terminal device 5, and does not constitute a limitation to the terminal device 5, and may include more or less components than those shown, or combine some components, or different components, such as an input-output device, a network access device, and the like.
The Processor 50 may be a Central Processing Unit (CPU), and the Processor 50 may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 51 may in some embodiments be an internal storage unit of the terminal device 5, such as a hard disk or a memory of the terminal device 5. The memory 51 may also be an external storage device of the terminal device 5 in other embodiments, such as a plug-in hard disk provided on the terminal device 5, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 51 may also include both an internal storage unit of the terminal device 5 and an external storage device. The memory 51 is used for storing an operating system, an application program, a BootLoader (BootLoader), data, and other programs, such as program codes of the computer program. The memory 51 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the above-mentioned apparatus may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium and can implement the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include at least: any entity or device capable of carrying the computer program code, recording medium, computer Memory, Read-Only Memory (ROM), Random-Access Memory (RAM), electrical carrier wave signals, telecommunications signals, and software distribution medium. Such as a usb-disk, a removable hard disk, a magnetic or optical disk, etc. In certain jurisdictions, computer-readable media may not be an electrical carrier signal or a telecommunications signal in accordance with legislative and patent practice.
The present application may also implement all or part of the processes in the method according to the foregoing embodiments, and may also be implemented by a computer program product, when the computer program product runs on a terminal device, the steps in the first method embodiment may be implemented when the terminal device executes the computer program product, or when the computer program product runs on the terminal device, the steps in the second method embodiment may be implemented when the terminal device executes the computer program product.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. An ammonia injection control method for flue gas denitration is characterized by comprising the following steps:
acquiring real-time flue gas data and a time tag of the real-time flue gas data, wherein the real-time flue gas data comprises real-time inlet data of a flue gas inlet and real-time outlet data of a flue gas outlet, the real-time inlet data is used for reflecting flue gas characteristics of the flue gas inlet, and the real-time outlet data is used for reflecting flue gas characteristics of the flue gas outlet;
acquiring historical ammonia injection control data;
according to the real-time flue gas data and the historical ammonia injection control data, acquiring target ammonia injection flow, target ammonia injection pipeline pressure and target ammonia injection delay time;
acquiring a target ammonia spraying time point according to the time label and the target ammonia spraying delay time length;
and sending the target ammonia spraying time point, the target ammonia spraying flow and the target ammonia spraying pipeline pressure to a target valve body, wherein the target ammonia spraying time point, the target ammonia spraying flow and the target ammonia spraying pipeline pressure are used for indicating the target valve body to spray ammonia.
2. The ammonia injection control method according to claim 1, wherein the historical ammonia injection control data comprises at least one set of control data, and the set of control data comprises flue gas historical data and ammonia injection flow, flow weighting coefficients, ammonia injection pipeline pressure, pressure weighting coefficients, ammonia injection delay time and time weighting coefficients corresponding to the flue gas historical data; according to the real-time flue gas data and the historical ammonia injection control data, the target ammonia injection flow, the target ammonia injection pipeline pressure and the target ammonia injection delay time length are obtained, and the method comprises the following steps:
detecting whether the at least one group of control data has the same smoke history data as the smoke real-time data;
if the flue gas historical data which is the same as the flue gas real-time data exists, determining the flue gas historical data which is the same as the flue gas real-time data as target flue gas historical data, and determining the ammonia injection flow rate corresponding to the target flue gas historical data as the target ammonia injection flow rate, wherein the ammonia injection pipeline pressure corresponding to the target flue gas historical data is the target ammonia injection pipeline pressure, and the ammonia injection delay time corresponding to the target flue gas historical data is the target ammonia injection delay time;
if the flue gas historical data which are the same as the flue gas real-time data do not exist, the similarity between the flue gas historical data in the at least one group of control data and the flue gas real-time data is obtained;
detecting whether smoke historical data with the similarity exceeding a similarity threshold exists in the at least one group of control data;
if the smoke history data with the similarity exceeding the similarity threshold value with the smoke real-time data exists, determining the smoke history data with the similarity exceeding the similarity threshold value with the smoke real-time data as alternative smoke history data, and acquiring a difference value between the alternative smoke history data and the smoke real-time data;
acquiring a flow weighted value according to the difference value and a flow weighted coefficient corresponding to the alternative flue gas historical data; acquiring a pressure weighted value according to the difference value and a pressure weighted coefficient corresponding to the alternative flue gas historical data; acquiring a duration weighted value according to the difference value and a duration weighted coefficient corresponding to the alternative flue gas historical data;
correcting the ammonia injection flow corresponding to the historical data of the alternative flue gas according to the flow weighting value to obtain the target ammonia injection flow; correcting the ammonia injection pipeline pressure corresponding to the historical data of the alternative flue gas according to the pressure weighted value to obtain the target ammonia injection pipeline pressure; and correcting the ammonia spraying delay time corresponding to the alternative flue gas historical data according to the time weighting value to obtain the target ammonia spraying delay time.
3. The ammonia injection control method according to claim 2, further comprising, after sending the target ammonia injection time point, the target ammonia injection flow rate, and the target ammonia injection line pressure to a target valve body:
obtaining candidate NO of smoke outletxConcentration of theCandidate NO of flue gas outletxThe concentration acquisition time point is a time point corresponding to the time point when the timing time reaches the preset time length after the target ammonia spraying time point is timed;
according to the inlet real-time data, the target ammonia injection flow, the target ammonia injection pipeline pressure and the candidate NOxConcentration, obtaining denitration efficiency;
judging the candidate NOxWhether the concentration is within a concentration threshold and whether the denitration efficiency is within an efficiency threshold;
if the candidate NOxIf the concentration is not within the concentration threshold or the denitration efficiency is not within the efficiency threshold, modifying at least one coefficient of the flow weighting coefficient, the pressure weighting coefficient and the duration weighting coefficient, taking the alternative flue gas historical data, the ammonia injection flow, the ammonia injection pipeline pressure and the ammonia injection delay duration corresponding to the alternative flue gas historical data, and modified and unmodified coefficients of the flow weighting coefficient, the pressure weighting coefficient and the duration weighting coefficient as a group of control data, and adding the group of control data to the historical ammonia injection control data;
if said NO isxAnd if the concentration is within the concentration threshold value and the denitration efficiency is within the efficiency threshold value, taking the real-time flue gas data, the flow weighting coefficient, the pressure weighting coefficient and the duration weighting coefficient corresponding to the historical alternative flue gas data, the target ammonia injection flow, the target ammonia injection pipeline pressure and the target ammonia injection delay duration as a group of control data, and adding the group of control data to the historical ammonia injection control data.
4. The ammonia injection control method according to claim 1, wherein before obtaining the target ammonia injection flow rate, the target ammonia injection pipeline pressure and the target ammonia injection delay time according to the real-time flue gas data and the historical ammonia injection control data, the method further comprises:
judging whether the real-time data of the flue gas is effective or not;
correspondingly, the step of obtaining the target ammonia injection flow, the target ammonia injection pipeline pressure and the target ammonia injection delay time according to the real-time flue gas data and the historical ammonia injection control data comprises the following steps:
and if the real-time flue gas data is valid, acquiring the target ammonia injection flow, the target ammonia injection pipeline pressure and the target ammonia injection delay time length according to the real-time flue gas data and the historical ammonia injection control data.
5. The ammonia injection control method of claim 4, wherein the determining whether the real-time flue gas data is valid comprises:
acquiring at least one group of parameter ranges;
judging whether the real-time flue gas data are in one group of parameter ranges in the at least one group of parameter ranges;
if the real-time flue gas data is in one of the at least one group of parameter ranges, determining that the real-time flue gas data is valid;
and if the real-time flue gas data is not in one of the at least one group of parameter ranges, determining that the real-time flue gas data is invalid.
6. The ammonia injection control method according to claim 5, wherein the determining whether the real-time flue gas data is valid further comprises:
acquiring the working state of target equipment;
judging whether the working state of the target equipment is normal or not;
if the working state of the target equipment is abnormal, determining that the real-time smoke data is invalid;
correspondingly, if the real-time flue gas data is within one of the at least one set of parameter ranges, determining that the real-time flue gas data is valid comprises:
and if the working state of the target equipment is normal and the real-time flue gas data is in one of the at least one group of parameter ranges, determining that the real-time flue gas data is valid.
7. The utility model provides a flue gas denitration spout ammonia controlling means which characterized in that, spout ammonia controlling means includes:
the real-time data acquisition module is used for acquiring real-time flue gas data and a time tag of the real-time flue gas data, wherein the real-time flue gas data comprises real-time inlet data of a flue gas inlet and real-time outlet data of a flue gas outlet, the real-time inlet data is used for reflecting flue gas characteristics of the flue gas inlet, and the real-time outlet data is used for reflecting flue gas characteristics of the flue gas outlet;
the control data acquisition module is used for acquiring historical ammonia spraying control data;
the data acquisition module is used for acquiring target ammonia spraying flow, target ammonia spraying pipeline pressure and target ammonia spraying delay time according to the real-time flue gas data and the historical ammonia spraying control data;
the time point acquisition module is used for acquiring a target ammonia spraying time point according to the time label and the target ammonia spraying delay time length;
and the data sending module is used for sending the target ammonia spraying time point, the target ammonia spraying flow and the target ammonia spraying pipeline pressure to a target valve body, and the target ammonia spraying time point, the target ammonia spraying flow and the target ammonia spraying pipeline pressure are used for indicating the target valve body to spray ammonia.
8. The ammonia injection control device according to claim 7, further comprising:
the data validity judging module is used for judging whether the real-time data of the flue gas is valid or not;
correspondingly, the data acquisition module is used for acquiring the target ammonia injection flow, the target ammonia injection pipeline pressure and the target ammonia injection delay time according to the real-time flue gas data and the historical ammonia injection control data if the real-time flue gas data are valid.
9. A terminal device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the ammonia injection control method for flue gas denitration according to any one of claims 1 to 6 when executing the computer program.
10. A computer-readable storage medium storing a computer program, wherein the computer program is executed by a processor to implement the ammonia injection control method for denitration of flue gas according to any one of claims 1 to 6.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08238416A (en) * | 1995-03-03 | 1996-09-17 | Babcock Hitachi Kk | Method and apparatus for controlling injection of ammonia into denitration apparatus |
| GB201211293D0 (en) * | 2012-06-26 | 2012-08-08 | Perkins Engines Co Ltd | Method and apparatus for selective catalytic reduction device slip detection |
| JP2015075277A (en) * | 2013-10-09 | 2015-04-20 | 三菱日立パワーシステムズ株式会社 | Ammonia injection quantity control device and ammonia injection quantity control method |
| CN108187492A (en) * | 2018-01-17 | 2018-06-22 | 广东电网有限责任公司电力科学研究院 | A kind of spray ammonia control method and device |
| CN110368808A (en) * | 2019-07-18 | 2019-10-25 | 华北电力科学研究院有限责任公司 | A kind of the ammonia spraying amount control method and system of SCR flue gas denitrification system |
| US20210086130A1 (en) * | 2017-09-12 | 2021-03-25 | General Electric Company | System and method for optimized operation of flue gas desulfurization unit |
| CN213690254U (en) * | 2020-11-25 | 2021-07-13 | 国家电投集团重庆合川发电有限公司 | Flue gas denitration ammonia injection automatic control system |
-
2020
- 2020-06-17 CN CN202010553709.XA patent/CN113750793B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08238416A (en) * | 1995-03-03 | 1996-09-17 | Babcock Hitachi Kk | Method and apparatus for controlling injection of ammonia into denitration apparatus |
| GB201211293D0 (en) * | 2012-06-26 | 2012-08-08 | Perkins Engines Co Ltd | Method and apparatus for selective catalytic reduction device slip detection |
| JP2015075277A (en) * | 2013-10-09 | 2015-04-20 | 三菱日立パワーシステムズ株式会社 | Ammonia injection quantity control device and ammonia injection quantity control method |
| US20210086130A1 (en) * | 2017-09-12 | 2021-03-25 | General Electric Company | System and method for optimized operation of flue gas desulfurization unit |
| CN108187492A (en) * | 2018-01-17 | 2018-06-22 | 广东电网有限责任公司电力科学研究院 | A kind of spray ammonia control method and device |
| CN110368808A (en) * | 2019-07-18 | 2019-10-25 | 华北电力科学研究院有限责任公司 | A kind of the ammonia spraying amount control method and system of SCR flue gas denitrification system |
| CN213690254U (en) * | 2020-11-25 | 2021-07-13 | 国家电投集团重庆合川发电有限公司 | Flue gas denitration ammonia injection automatic control system |
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